Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854080 | Apparatus for sharpening periodontal instruments | Ludwig Romhild, Peter Reinhard | 1989-08-08 |
| 4820153 | Process and apparatus for cleaning a tooth | Ludwig Romhild, Peter Reinhard | 1989-04-11 |
| 4820154 | Dental instrument with a tool for treating the teeth | Ludwig Romhild, Peter Reinhard | 1989-04-11 |